[Plugin: BAW Easy Invitation Codes] Using with WP-MS

I have been trying to get this invite code plugin to work on my wp multi site. I read that it doesn’t work on ms or BP. I was wondering if you had plans to make it work on them.

I would like to use to stop spam accounts from being registered. I have in use on non MS sites and it work to sop spam because they don’t know about having to put in the invite code even when I put a “common” code in the area for the link below the reg form.
Under “Some Options” –>
Instead of: “Need an invitation code? Contact [email protected]”
I use: “Need an invitation code? Try this one: XXXXXX”

Any way you can make the form show the code entry area on the “sign-up” form of the MS version of WP?

Thanks for the help!

http://ww.wp.xz.cn/extend/plugins/baw-invitation-codes/